Common issues Heavy repetitive motions;  awkward positions; vibration Using wrenches can potentially involve heavy and/or repetitive motions, often in an awkward working position. Some power wrenches […]

Common issues Awkward, inefficient Manual screwdrivers are adequate for infrequent tasks, but generally insufficient for typical assembly tasks. They tend to be  awkward and require too […]

Self-closing gripper for buffing small parts Principles affected Fatigue Related pages Workstations Fixtures Background Picking up and holding small items can be difficult for several reasons, […]

Background Old sewing machine Manipulator using potter’s wheel Foot pedals were common in the past as a source of power in various tools and equipment. Sewing […]

Background Manhandling barrel to empty liquid Pumps should be considered whenever liquids are handled in heavy containers. In particular, the availability of inexpensive manual pumps is […]

Background Mechanism Ratchet wrench Ratchets are commonly incorporated into tools to increase efficiency and ease of use. The mechanism reduces motions by eliminating the need to […]

Background Power steering The terms “power assist” and “mechanical assist” are used loosely in general industry, but generally refers to any device that actively aids the […]

Background Without hinge: Difficult With hinge: Easy Hinges are often overlooked as a simple way to improve efficiency and physical demands on people. They should be […]

Screw clamp: Slow, forceful Quick release: Fast, easy Principles affected Force Motions Related pages Access panels Fixtures Background Quick releases and disconnects have multiple advantages over […]